in HT service 3ph 4 wire service Y-phase voltage shows zero . whether it is meter fault? or what be the reason ? if y-ph voltage zero ,can current is recorded? reasons for failure?

0 Answers   apspdcl,

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why ferranti efect occurs on no load only?

3 Answers  

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The exciting current of a transformer is non sinusoidal. why?

2 Answers  

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what is called star connection and delta connection also purpose of this connections?

3 Answers   Siemens,

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How to calcualte the total number of cells required for particular UPS of some X KVA with 3 and 5 hours back-up?

1 Answers   JLL,

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Why battery chargers are use in substation?

5 Answers  

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what is transformer?

4 Answers   Mphasis,

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we need a ntpc previous papers

0 Answers  

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What is GIS Substation and how it operate? where these type of substation installed?

8 Answers   Power Grid,

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sir,i am swati. i am goin to gv jspl exam on 21st nov'10. iwant previous year question paper. plz help me out. my emailid is swatisinha.dav@gmail.com

1 Answers  

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How many earthings are required for motors?

3 Answers  

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In siemens S7-300 PLC, what is function and function block ? What is the difference between them ? When to use function and when to use function block ?

0 Answers  

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